<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    ul>li {
        /* 切换原点或正方形列表 */
        /* list-style: inside; */
        /* list-style 控制项目标志 inside 是插入li里面的意思  */
        list-style-type: square;
        /* type 是项目种类，比如默认原点 */
        background-color: pink;
    }
</style>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
    <script>
        let res = window.open("www.baidu.com");
        console.log(res); //返回window
    </script>
</body>

</html>